Elements of Geometry and Trigonometry: From the Works of A.M. Legendre

ABCD altitude base called centre chord circle circumference circumscribed common comp cone consequently construction contained corresponding cosine Cotang cylinder described determine diagonal diameter difference distance divided draw drawn edges equal equations equivalent example expressed extremities faces fall feet figure follows formed four frustum given greater half height hence hypothenuse included inscribed intersect length less limit logarithm magnitudes manner mean measured meet middle multiplied opposite parallel parallelogram parallelopipedon pass perimeter perpendicular plane polygon prism PROBLEM proportional PROPOSITION pyramid quadrant radii radius ratio reason rectangle regular remaining right angles right-angled triangle Scholium segment sides similar sine solidity sphere spherical triangle square straight line suppose taken Tang tangent THEOREM third triangle triangle ABC unit vertex vertices whole